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Howard-
Yep, that's something that's always worth keeping in mind. Like a statistic I saw on reddit the other day which said 76% of the deaths (I think, might have been of all people on ventilators regardless of the outcome) in Italy have hypertension. Now it seems reasonable to assume that this means hypertension is a problem when you get Covid-19, but at the same time, if you were to sample a population of the same age distribution randomly, the percentage of people with hypertension would be lower, but not that much lower. So another case where it's difficult to immediately tell whether there's causation or just correlation, purely based on the numbers.
SwissChap
Obesity is a complicating factor which is not named as an an underlying health condition. Might be a relief? 80% of IC patients in the Netherlands are overweight.